Terms including HD, FHD, 4K and 8K stand for different image definition grades, differentiated mainly by total pixel counts.

HD (High Definition)Standardized as 720p (1280×720 pixels), the basic high-definition specification.

Full HD (FHD)Commonly called Ultra Clear, marked as 1080p (1920×1080 pixels) with greatly improved image details.

4K Ultra HD3840×2160 resolution (around 8.3 million pixels), four times the pixel quantity of Full HD. Featuring exquisite details, it has become the mainstream standard for high-end displays and video resources.

8K Ultra HD7680×4320 resolution (roughly 33 million pixels), quadruple pixels of 4K. It delivers exceptional detail and immersive viewing experience; limited available content makes it a future-oriented format.

In short, resolution doubles progressively from HD to 8K with exponentially rising pixels, generating finer and more lifelike visuals. Screen size, viewing distance and available source files should be taken into account for product selection.